#!/usr/bin/env python # This file is part of ROBOTGAME # # ROBOTGAME is free software: you can redistribute it and/or modify it under the # terms of the GNU General Public License as published by the Free Software # Foundation, either version 3 of the License, or (at your option) any later # version. # # ROBOTGAME is distributed in the hope that it will be useful, but WITHOUT ANY # WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR # A PARTICULAR PURPOSE. See the GNU General Public License for more details. # # You should have received a copy of the GNU General Public License along with # ROBOTGAME. If not, see . # # ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' # # direction.py # -------------------- # date created : Tue Aug 7 2012 # copyright : (C) 2012 Niels G. W. Serup # maintained by : Niels G. W. Serup """Directions.""" class Direction(object): @staticmethod def next_pos(pos): raise NotImplementedError @staticmethod def to_str(): raise NotImplementedError @staticmethod def from_sakse(p): return {(0, -1): Up, (0, 1): Down, (-1, 0): Left, (1, 0): Right}[p] class Up(Direction): @staticmethod def next_pos(pos): x, y = pos return x, y - 1 @staticmethod def to_str(): return 'up' class Right(Direction): @staticmethod def next_pos(pos): x, y = pos return x + 1, y @staticmethod def to_str(): return 'right' class Down(Direction): @staticmethod def next_pos(pos): x, y = pos return x, y + 1 @staticmethod def to_str(): return 'down' class Left(Direction): @staticmethod def next_pos(pos): x, y = pos return x - 1, y @staticmethod def to_str(): return 'left' all_directions = (Up, Right, Down, Left) _sp = lambda n: lambda d: all_directions[(all_directions.index(d) + n) % 4] succ, pred = _sp(1), _sp(-1) isDirection = all_directions.__contains__